Description of problem:
On 'Server Settings'/'Security'/'Cipher preferences' tab, allowing a specific cipher will remove all enabled cipher, if 'default ciphers' is selected after that.


Version-Release number of selected component (if applicable):
cockpit-389-ds-1.4.2.9-1.module+el8dsrv+6001+1cbc6dcf.noarch


How reproducible:
always

Steps to Reproduce:
1. Go to 'Server Settings'/'Security'/'Cipher preferences'
2. Select a cipher in 'allow specific ciphers' list
3. click 'Default ciphers'
3. 'Save cipher preferences' 
4. restart the instance
5. Come back to 'Server Settings'/'Security'/'Cipher preferences'

Actual results:
The 'Enabled ciphers' list is empty

Expected results:
Enabled ciphers are default ones plus added allowed specific cipher

Additional info: 
A search of the list of enabled ciphers with dsconf will show : 'List of ciphers is empty'